If You’ll Be Away for a While
Planning to be gone for more than two or three weeks? Add one extra step for long-term protection:
After cleaning and rinsing with vinegar and lemon, pour about one tablespoon of cooking oil or mineral oil down the drain.
The oil forms a thin layer that floats on the surface of the water in the trap, sealing it against evaporation. Then, cover the drain with your paper and glass as usual. This combination can keep your sink fresh for weeks or even months.
